The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2002
Filed:
Mar. 24, 2000
Yasuyuki Suzuki, Tokyo, JP;
Suzuki Kanshi Co., Ltd., Tokyo, JP;
Abstract
An extrusion molding method including plasticizing and kneading a raw material ( ), composed of a synthetic resin material having high heat-resistance and strength, extruding the material from a molding die ( ) to form a tubular body ( ), passing the tubular body ( ) on a sizing die ( ) to give it a final inner diameter, cooling and hardening the tubular body ( ). The molding die ( ) and sizing die ( ) are coupled to each other by a connecting pipe ( ). The sizing die ( ) is made of a carbon material. A first air ( ) is supplied to an interior of the sizing die ( ) through the connecting pipe ( ). A second air ( ) is supplied to an interior of the molding die ( ) so that an air lubrication layer is formed between an inner surface ( ) of the continuous product ( ) and an outer surface ( ) of the sizing die ( ).